US1513945A

US1513945A - Gear driving mechanism

Info

Publication number: US1513945A
Application number: US175124A
Authority: US
Inventors: Jesse G Vincent
Original assignee: Packard Motor Car Co
Current assignee: Packard Motor Car Co
Priority date: 1917-06-16
Filing date: 1917-06-16
Publication date: 1924-11-04
Anticipated expiration: 1941-11-04

Description

Nov 4 1 924.

J. G. VINCENT GEAR DRIVING MECHANISM Filed June 16 27666@ @Fuz/00u65,

Y BY M ATTORNEY JESSE Gi'. VINCENT, OF'DETROIT, MICHIGAN, ASSIGN OR TO PACKARD MOTOR CAR COM- 1PANY,`OF DETROIT, MICHIGAN, A CORPORATION 0F MICHIGAN.

GEAR DRIVING MECHANISIVI.

Applipaton led .Tune 16, 1917. ,Serial No. 175,124.

mechanism and particularly to such mecha- Y pism involving bevel gears and shafts there- One of the objects of the invention is to provide a double drive from a single source in which the end thrusts will be balanced so far as the driving shaft isl concerned.y

Another object of the invention is to pro,- vide a novel fand efcient driving mechanism for aeroplane Propellers particularly where two such propellers lare used and driven from a single source of power.

Another object of the invention isto provide a driving mechanism from a single shaft to two driven shafts in which the end thrusts on the driving shaft will be balanced.,

@ther objects of the invention will appear from the following description taken in connection with the drawing, which forms a part of this specification, and in which Fig. 1 is a plan and part sectional view ofda mechanism containing this invention, an

Fig.2 is a similar view of another form of the invention.

f Referring to the drawings .represents a supporting structure which may be a caslng, the part 11 of which may constitute a prank case of -a hydrocarbon or other motor forming a source of power. rllhe, part 12 is 'shown in the form Yof a casing for some of the gearsl and shafts of the invention.

A motor crank shaft is illustrated at 13 and the extended part 14 of this shaft forms themain driving shaft'of the gear mechanism of this invention. as illustrated is in three tubular portions 15, 16 and 17, which are rigidly secured together as by bolts 18 and 19, and some of these portions are formed integral with some of the gears hereinafter mentioned.

, This main driving shaft as a whole is mounted in the casing in aligned hearings 20` and 21, and it will be understood that with the arrangement shown there may be one motor connected at one end of the lshaft or there may be a. motor connectrlFhis extended part ed at each end of theV shaft or the shaft itself `may' form the middle part of the crank shaft of a. single motor. lt is important however that in any case, where power is to be taken from this shaft there should be as little end thrust as possible on' the motor shaft and in the present. invention such end thrust is practically eliminatedJ although the power is taken from the main drivin shaft through bevel gears.

The main driving shaft 14 is provided with a pair of oppositely facing

bevel gears

22 and 23 of 'similar size and form. These gears are somewhat separated and the gear 22 is adapted tomeshwith a bevel gear 24 and the gear 23 is adapted to mesh with a gear 25, the gears 24 and 25 being on oppo-L site sides of the shaft 14 and slightly out of alignment so that there will be no interference. The gear 24 is mounted in compartment 12 of the casing 10 in

bearings

26 and 27, the latter including a thrust bearing 28 which takes the outward end thrust of the gear 24. The gear is also mounted in the compartment 12 and in

similar bearings

29 and 30, the latter including a thrust bearing 31. The gears 24 and 25 are connected through universal joints 32 with shafts 33 extending laterally from the casing 10, and the outer ends of these shafts 33 have bevel gears 34 meshing with gears 35 on shafts 36 of propellers 37, the latter consituting driving propellers ofv an aeroplane or similar vehicle. f

From the above description of the mechanism shown in Fig. 1 of the drawing it will be apparent that the end thrust on the main driving shaft 14 caused 'by the meshing of gears 22.and24 will be exactly balanced by the end thrust caused by the meshing of the gears 23 and 25'y and there will therefore be no resulting end thrust on the shaft 14 to be h taken by the bearing supporting vthat shaft.v rlihe axialend thrust of the gears 24 and 25 will be taken by their respective thrust y bearings 28 and 31, or,l when the universal joints '32 are so formed as to be capable of transmitting end thrust, some of theithrust of these gears 24 and 25 will be balanced by the reverse end thrust of the bevel gears 34. 0f course suitable bearings, not shown, will be provided yfor the shafts 36 to take whatever end thrust there may be on those shafts.

In Fig. 2 the main shaft 14a is in two portions only, these portions being connected by the. bolts 18a and the webbcd portion 1Gn of the gears hereinafter referred to. Also the gears 22a and 23a are shown as integra-l and are facing'away from each other instead of towards each other as in Fig. 1. The gears 24 and 25 are similar to the corresponding gears in Fig. 1 and mesh respectively with the gears 22 and 23a. The other parts of the mechanism are similar to that shown in Fig. 1.

It will be seen that in the mechanism shown in Fig. 2 there is also a balancing of the end thrust of the gears 22a and 23a s0 that there is practically no end thrust on the main` shaft 14a.

Other forms of the invention may `be made without departing from the scope of the invention 'Shown and it is intended that such modifications shall be within the scope of the claims appended hereto.

together as in said support,

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. The combination with a support, of a gear shaft, motor crank shafts mounted in said support and directly connected to either end of said gear shaft, two laterally extending driven shafts mounted in bearings and a pair of bevel gears connecting /each of said driven shafts to said gear shaft. v

2. rlhe combination with a support, of two aligned motor shafts mounted in said support, two laterally extending driven shafts mounted in bearings in said support, means connecting said motor shafts, and a pair of bevel gears connecting each of said driven vshafts to the motor shafts.

In testimony whereof I aix m` v JESSE G.

si nature. NG NT.